Ringed Turtle-Doves also have a laugh-like  heh-heh-heh  call when excited. The White-winged Dove (Zenaida asiatica, also non-native) and the Mourning Dove (Zenaida macroura, a Florida native) are also very similar in size and appearance to the Eurasian Collared-Dove, but neither species has a black collar.
The megagametophyte produces an egg cell (or several egg cells in some groups) for the purpose of fertilization. After fertilization, the ovule develops into a seed.he ovary of the gynoecium produces one or more ovules and ultimately becomes the fruit wall. Ovules are attached to the placenta in the ovary through a stalk-like structure known as a funiculus (plural, funiculi). Different patterns of ovule attachment, or placentation, can be found among plant species, these include:
A fertilized egg does not mean that it has a chick inside it. It has an embryo (blastoderm-fertilized blastodisc) and this embryo is capable of producing a chick (within 21 days), if incubated in proper conditions. The embryo in a fertilized egg looks like a small flat disc with a ring around it. If refrigerated, fertilized eggs are like the unfertilized ones and do not develop further. Most of the poultry farms have specialized candling equipment for identifying fertile chicken eggs.